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Home >> Nissan-Datsun Truck >> 2010 >> Rogue 2WD L4-2.5L (QR25DE) >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Cooling System >> Testing and Inspection >> Component Tests and General Diagnostics >> Diagnosis Procedure >> For Mexico

For Mexico





COOLING FAN


Description

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant pressure, and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].

COOLING FAN MOTOR
The cooling fan operates at each speed when the current flows in the cooling fan motor as follows.





The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under middle speed condition. For Mexico.





COOLING FAN


Diagnosis Procedure


PROCEDURE A
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace ground connection.
2.CHECK COOLING FAN MOTORS POWER SUPPLY CIRCUIT-I
1. Disconnect cooling fan motor-2 harness connector.
2. Check the voltage between cooling fan motor-2 harness connectors and ground.





3. Also check harness for short to ground or short to power.
Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- 40 A fusible link (letter M)
- Harness for open or short between cooling fan motor-2 and battery
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK COOLING FAN MOTORS POWER SUPPLY CIRCUIT-II
1. Disconnect cooling fan relay-4.
2. Turn ignition switch ON.
3. Check the voltage between cooling fan relay-4 harness connectors and ground.





4. Also check harness for short to ground or short to power.
Is the inspection result normal?
YES - GO TO 6.
NO - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R harness connector E14
- 15 A fuse (No. 63)
- Harness for open or short between cooling fan relay-4 and fuse
- Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK COOLING FAN MOTORS GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor-1 harness connector.
3. Check the continuity between cooling fan motor-1 harness connectors and ground.





4. Also check harness for short to ground or short to power.
Is the inspection result normal?
YES - GO TO 7.
NO - Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK COOLING FAN MOTORS CIRCUIT FOR OPEN AND SHORT
1. Disconnect IPDM E/R harness connector E13.
2. Check the continuity between cooling fan motor-2 harness connectors and cooling fan relay-4 harness connectors.





3. Check the continuity between cooling fan relay-4 harness connectors and cooling fan motor-1 harness connectors and ground.





4. Check the continuity between cooling fan relay-4 harness connectors and IPDM E/R harness connectors.





5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES - GO TO 8.
NO - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK COOLING FAN RELAY-4
For Mexico.
Is the inspection result normal?
YES - GO TO 9.
NO - Replace cooling fan relay.
9.CHECK COOLING FAN MOTORS
For Mexico.
Is the inspection result normal?
YES - GO TO 10.
NO - Replace malfunctioning cooling fan motor.
10.CHECK INTERMITTENT INCIDENT
Perform Intermittent Incident.
Is the inspection result normal?
YES - Replace IPDM E/R.
NO - Repair or replace harness or connector.

PROCEDURE B
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E21, E38. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace ground connection.
2.CHECK IPDM E/R POWER SUPPLY AND GROUND CIRCUIT
Power supply and ground circuit. Testing and Inspection.
Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace malfunctioning part.
3.CHECK COOLING FAN MOTORS POWER SUPPLY CIRCUIT-I
1. Disconnect cooling fan motor-2 harness connector.
2. Check the voltage between cooling fan motor-2 harness connector and ground.





3. Also check harness for short to ground or short to power.
Is the inspection result normal?
YES - GO TO 5.
NO - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- 40 A fusible link (letter M)
- Harness for open or short between cooling fan motor-2 and battery
- Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK COOLING FAN MOTORS POWER SUPPLY CIRCUIT-II
1. Disconnect cooling fan relay-5.
2. Turn ignition switch ON.
3. Check the voltage between cooling fan relay-5 harness connector and ground.





4. Also check harness for short to ground or short to power.
Is the inspection result normal?
YES - GO TO 7.
NO - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R harness connector E14
- 15 A fuse (No. 63)
- Harness for open or short between cooling fan relay-5 and fuse
- Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK COOLING FAN MOTORS GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor-1 harness connector.
3. Check the continuity between cooling fan motor-1 harness connector and ground.





4. Check the continuity between cooling fan relay-5 harness connector and ground.





5. Also check harness for short to ground or short to power.
Is the inspection result normal?
YES - GO TO 8.
NO - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK COOLING FAN MOTORS CIRCUIT FOR OPEN AND SHORT
1. Disconnect IPDM E/R harness connector E15.
2. Check the continuity between cooling fan motor-2 harness connector and cooling fan relay-5 harness connector.





3. Check the continuity between cooling fan motor-2 harness connectors and IPDM E/R harness connectors.





4. Check the continuity between cooling fan relay-5 harness connectors and IPDM E/R harness connectors.





5. Check the continuity between cooling fan motor-1 harness connectors and IPDM E/R harness connectors.





6. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES - GO TO 9.
NO - Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK COOLING FAN RELAY-5
For Mexico.
Is the inspection result normal?
YES - GO TO 10.
NO - Replace cooling fan relay.
10.CHECK COOLING FAN MOTORS
For Mexico.
Is the inspection result normal?
YES - GO TO 11.
NO - Replace malfunctioning cooling fan motor.
11.CHECK INTERMITTENT INCIDENT
Perform Intermittent Incident.
Is the inspection result normal?
YES - Replace IPDM E/R.
NO - Repair or replace harness or connector.
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